Sew-made: Zip around boxy pencil case organizer

Assalammualaikum.

Hello! 

It's still a school holiday in Malaysia until 3rd/4th January 2016.

Both my husband and I design this zip-around boxy pencil case organizer. I think the design is for corporate or unique people who want to have something different from others (like me!) but my husband wants it available for students. 

So, this is my first prototype.

A boxy pencil case at the center of the organizer.

We planned to redesign so it fits a scientific calculator (as requested by my first order!) :) and the depth also.

This is still in the prototype, but what do you think?